We never washed our quilts. When the top/outside started to look bad, the quilt was taken apart. The outsides were washed and repaired and maybe replaced. The wool inside held up better if it was encased in cheese cloth. If not, it may have needed to be re-carded. I don't know if there are woolen mills around anymore that do that. Ours closed about 20 years ago.
Wool is a natural fiber and does not hold bad smells. A few hours on the clothes line refreshed it. Overnight was even better, if you trusted the weather.